Revert "tty/8250_pnp: serial port detection regression since v3.7"

This reverts commit 77e372a3d82e5e4878ce1962207edd766773cc76.

Checking for disabled resources board breaks detection pnp on another
board "AMI UEFI implementation (Version: 0406 Release Date: 06/06/2012)".
I'm working with the reporter of the original bug to write and test
a better fix.

https://bugzilla.redhat.com/show_bug.cgi?id=928246

Signed-off-by: Sean Young <sean@mess.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c
index b3455a9..35d9ab9 100644 (file)
--- a/drivers/tty/serial/8250/8250_pnp.c
+++ b/drivers/tty/serial/8250/8250_pnp.c
@@ -429,7 +429,6 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
 {
        struct uart_8250_port uart;
        int ret, line, flags = dev_id->driver_data;
-       struct resource *res = NULL;
 
        if (flags & UNKNOWN_DEV) {
                ret = serial_pnp_guess_board(dev);
@@ -440,12 +439,11 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
        memset(&uart, 0, sizeof(uart));
        if (pnp_irq_valid(dev, 0))
                uart.port.irq = pnp_irq(dev, 0);
-       if ((flags & CIR_PORT) && pnp_port_valid(dev, 2))
-               res = pnp_get_resource(dev, IORESOURCE_IO, 2);
-       else if (pnp_port_valid(dev, 0))
-               res = pnp_get_resource(dev, IORESOURCE_IO, 0);
-       if (pnp_resource_enabled(res)) {
-               uart.port.iobase = res->start;
+       if ((flags & CIR_PORT) && pnp_port_valid(dev, 2)) {
+               uart.port.iobase = pnp_port_start(dev, 2);
+               uart.port.iotype = UPIO_PORT;
+       } else if (pnp_port_valid(dev, 0)) {
+               uart.port.iobase = pnp_port_start(dev, 0);
                uart.port.iotype = UPIO_PORT;
        } else if (pnp_mem_valid(dev, 0)) {
                uart.port.mapbase = pnp_mem_start(dev, 0);